Refill head for electric toothbrush



FIG. 1 is a front perspective view of the new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

All broken lines shown in the drawings illustrate environmental structure and form no part of the claimed design. 

CLAIM The ornamental design for a refill head for electric toothbrush, as shown and described. 